Axially shifting type, pedestal mounted tire removing machine



Dec. 7, 1948. I. N. HEWITT 2,455,580 AXIALLY SHIFTING TYPE, PEDESTAL MOUNTED, TIRE REMOVING MACHINE Filed May 26. 1945 INVENTOR. 25 IVAN N. HEWITT ATTORNEY.

Patented Dec. 7, 1948 :2 claims; (Cl. ran-s) PATENT OFFICE M ING TYrEQennEs'r-AL Q MOUNTED :rmunEMovmo .MACHINE I yanMedicineLodgeg-Kans. Application Keyed;d945, seriaindflsado is J rms. invention relates to. improvements neurosis an elevation looking in the dirction machines for removing tires from rims. 1 Tires, especially those used for trucks and tractons; arelarge and heavy and frequently; re-

main on the rimsi ior along time. QTliejrirns employed are mostly ort e type knownns 'demountable rims? ithatflpermit the tires to beremoved by a sliding motion transyersely of the izim. I It is afOUlld that-automotive tires .01. the type. to

which this relates, irequenjtly adhereyerygsti'ongly to the .rim due to rust and rather causes and that for the removal of such tires, special tools must be employed. i

It :is the :object ot tireremoving ltool -that can be employedflwith tires of different sizes and which shall be so lconstmcted that it will employ both. direct pressure this invention to produce a and impact for the purpose oifreleasing thetire casing and removing itwirom the rim; w The pnincipalobject of .this invention produce a tire removing machine i.

Lao Ldevicei of; I

such construction that it employs both ahydriaug 1 lie, orother suitable, mechanism ,forexerting a gradual and uniform pressure and in addition jh as such: a construction that certain releasin tools can be moved circumferentially and subjected to hammer lblOWS for the purpose sectionsiof the tire atia time. i i

jot releasing short :Anotherobjectis to produce atoolfor tliepur pose described in which the tire can; be quickly removed from the machine rand-replaced by another. l

The above-and other objects thatfmay become apparent as the description .proceeds are attained by means of a construction and an arrangement of :parts that will now be described in detail, and

for this purpose reference willbehadutoz the ac companying drawing, in which the invention has been illustrated in itspreferred term, and in and having partsthereof broken away to iurther Fi ure 12 isa top plan view of the machinelshown disclose the construction;

in Figure l; y

Figure 3 is a section showing the manner of.

securing one of the pressure arms in position;

@Eigure iyisrasection taken on line 4-4, fi ure 3;

Figure 5 is airagme'ntary top 'plan view showing a the adjustable su porting the construction of bars;

i'FPiEurelS is a seictiomtaken on fingers; and

of arrows 8 8,F igure 7.

In the drawing reference numeral I0 designates a supporting floor surface and reference numeral H designates the base of the machine which is the base is a hydraulic cylinder l3,provided with a circular flange l4, 1 The cylinder is bolted to the base bymeans of tap screws IS. The upper end of the cylinder is provided with a removablei cap I6 thathas a stuffing box IT through which the pistonirodfl extends. "Apiston I9 is secured to thefl'ower end o'fthe piston rod. Caplfi is provided with a tubular lug 2|] to which one end of the oil pressurelinejll is connected. Another oil pressurefpipefis connected with the cylinder belowfltliypiston andthis has been designated by reierence humeralfil. Pipes 2| and 22 extend to a 4-way valvelathat controls the flow of liquid from apu mp which has not been shown. It is evident that when liquid is introduced through-pipe 22; piston l9 will move upwardly upper ends of which a circular rim supporting plate 25 issecured. ,Plate 25 is provided with four pairsof openings like .those designated by reference numeral 26 in, Figure 6, for the reception of bolts 21.. Rim supporting bars 28 are provided withislo tsiii for .the reception of the bolt and are also provided adjacent their outerends with short upwardly extending stops 30. It is evident from aninspectionoiirfiguresBand 6 that bars 28 may be adjusted radially by loosening bolts .21 and after i the bars have been positioned as desired,

may Ibeclamped inpositionby the bolts. A tire rim 3! is positioned onthelouter endsof bars 28 as shown most clearly in Figure 1. The tire eelsing has been indicated by broken lines. In thedrawingthe rim supporting members have been shown as quite low or of the shape usedwithuremovable .rims. .Where the rims are secured to wheels; the supporting members extend upwardly to a greater height than shown in the drawing.

secured to thetop of the piston rod is a pressurepl-ated! that islheld in position by means of nut 33. Pressure plate 32 is provided with ;e1oneatedopenings34 sitioned forty-five de- Inthe drawing the base hasgrees apart, as shown in Figure 2 and with holes 35 in radial alignment with openings 34.

Carried by the pressure plate are a number of pressure arms 36, two such arm-s being shown in the drawing. Pressure arms 36 are preferably quite massive and may be heavier and of greater cross section than indicated in the drawing, the size and strength being optional, ,The inner-end of each arm is provided with a loop like that indicated by reference numeral 31 in Figure 3. This loop is positioned between the downwardly ex-;:;

tending lugs 38 of a U-shaped member whose base has an upwardly extendingbjolt 39 that projects through one of the holes 35 in plate 32. It will be evident that the pressure arms 36 may be turned about the axis of bolt 39 and also about ment resides in the construction that makes it practical to employ impact to release the casings. This is due to the fact that arms 36 are pivoted and held against the under surface of plate 32 by resilient means; this permits each arm to move downwardly independently of the others as indicated by dotted lines in Figure 1.

Arms .36 ay also turnslightly, about bolts 39 due to the arcuateholes 34; 1 1

Bars29' are adjustable for different sizes of rims.

Particular attention is called to the construction ofthe pressure fingers 44 and to the fact that "they have their lower ends curved in such a manthe pivot 4'0 that extends through the "loop 31;

equivalent construction, since the object is to hinge or pivot the pressure arms to the plate in such a manner that they will respond readilyto the impact of a hammer. 1

Each of the pressure arms is ,provided ,Witha pressure finger. These fingers have an enlarged portion 45 provided withian opening 46 of the propersize and shape to receive the pressure bars.

The upper end of each pressure finger has a head.

41 that receives the-hammer blowsduring the operation. Each pressure finger is also provided with an enlargement 48 that "can be enga ed by a,

hammer for the purpose of forcing point 49 into the space between the upper flange of the rim.

and the tire casing as shown in Figure '1; During operation the pressure arms and fingers are shift ed rotatably about the axis of the'piston rod and short sections of the tire casingare loosened at each operation. After loosening has been effected, the arms are rotated to new positions. Springs 43 are of sufiicient strength to lift thearms and.

chisel fingers.

After the tire casing has sure thereon to slide the casing downwardly and remove it from the rim. After the casing'has been loosened and removed, the a -way valve is reversed, moving the piston upwardly whereupon the tire rim and tire can be removed and replaced by another. n

This machine can also be employed in forcing been shown for exerting a downward pull on the pressure plate 32. It is to be understood that any other suitable jack mechanism can be substituted provided it operates in substantially the same way and produces the same result. A screw'jack like that shown in U. S. Patent 1,564,496," or a rack and pinion mechanism similar to that shown been loosened, oil under pressure is introduced into the cylinder above piston 19, exerting sufficient downwardly pres t.

'of tire rims:

ner that they will fit all different flanges; they are also of such length that they fit all widths Pressure fingers are also readily removable and r can be used and sold as hand tools for loosening the tire casing. Extr-apressure fingers are supplied. 'It is to be'understood that as' rn'any as eight arms 36 can be used. Pressure can be appliedby means of the jack and fingers '44. Hand tools" comprising fingers 44 can be used to loosen the casing at points between arms 36. A heavy hammer applied to tool 44 will start the casing moving after which pressure exerted by the jack will finish theyremoval.

The pressure fingers areradially adjustable and have been shown as slidably or telescopically mounted on arms 36. Any equivalent construction, can, of course be substituted.

Due to the projections 48 and the heads 4'! thepressurefingers are especially well adapted to be used with a hammer for loosening the tire.

The rimsupporting plate 25 has been shown as supported above base I I. This construction is'for the purpose of bringing the rim supporting plate to a convenient height. Supports 24 may be reduced in lengthtofany extent desired and base ligand supports. may be entirely omitted, if

Havingfdescribed the invention, what is claimed a new is;

1. 'A tireremoving and replacing device of the type describedfhaving a base adapted to rest on and be secured to a floor, a rim supporting table positioned above the base 'and supported by the latter, a pressure jack mechanism secured to the base andextending to a point above the table, said jack mechanism having two relatively movable members one of which is attached to the base and the other movable vertically, a pressure plate secured to the upper'endj'of the movable jack "member, a plurality of pressure bars secured to the under surface of the'pressure plate in radial position, the inner ends of said bars being connected for vertical pivotal movement, the pres- .,sure plate having an opening for each pressure a tire casing onto a rim, it being then necessary to reverse the rim from. the position shown in .Figure 1. v v e e 3 In the drawing a hydraulic jack mechanism has" in U. S. Patent 1,178,481 maybe substituted if desired. One of the important features of this improv ibar, bolts extending through the openings and through the'bars, a resilient means associated withthe bolts and bars for exerting forces tending to raise the barsand hold them against the under surface of the plate while permitting downward pivotal movement in response to hammer blows, and downwardly extending pressure fingers mountedon the pressure bars for radial adjustmenti 2 Ariin supporting table, a plurality of rim supporting members-secured thereto forradial adjustment, 9; pressure jack mechanism having one part attachedto said table and a movable memberpositioned above the-table, a pressure pl'ateconnected-with the movable jack member,

a plurality of pressure bars positioned underneath the pressure plate in angularly spaced relation, each bar having a pivotal connection with the pressure plate permitting it to move downwardly, a spring connecting each bar with the jpressure plate, forming means for holding it normally in face to face relation with the under surface of the plate, and pressure fingers connected with the bars for longitudinal adjustment.

IVAN N. HEWITT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date Cole July 10, 1894 Stevens May 19, 1925 Staugaard Dec. 8, 1925 ,Welch July 9, 1929 Weaver et a1 Aug. 13, 1929 Maulis Mar. 24, 1936 Hawkinson June 2, 1936 

